As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
CABIN CLIMBED AT MAX RATE, 10,000 FT, CABIN PRESSURE LIGHT CAME ON. THE PNUEMATIC RELAY WAS REMOVED AND REPLACED S/N OFF 15-2131. WORK PERFORMED IAW MM 21-31. SYSTEM OP'S AND LEAK CHECKED GOOD. ALSO REMOVED AND REPLACED FAULTY LT MLG SQUAT SWITCH IAW MM 32-61. SWITCH OP'S CHECKED GOOD.